JP2002225027A - U-shaped channel cutting apparatus and attachment for cutting u-shaped channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment for cutting a U-shaped channel by which a hydraulic source for cutting work for a block of the U-shaped channel is fed from a small-sized shovel type excavator and cut concrete pieces do not scatter. SOLUTION: Pulleys 31 each with a rotating cutter 30 are respectively provided on the front and back ends of a somewhat long hexagon-shaped movable frame 25 provided concentrically with the driving shaft 33 of a rotational driving member so as to be rocked on the underside of a machine base frame and the rotational driving member is rotationally driven by receiving feeding from the outside excavator to these pulleys with the rotating cutters 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a U-shaped groove cutting device and a U-shaped groove cutting attachment used for remodeling a side groove of a U-shaped groove block made of concrete.

[0002]

2. Description of the Related Art Conventionally, rainwater or domestic wastewater from a house flows into a gutter of a concrete U-shaped groove block on both sides or one side of a road such as a residential area, and this flows into a river to be drained. . However, recently, sewers with sewage pipes buried under roads have been completed, and the drains buried under these roads are being replaced by conventional gutters such as U-shaped groove blocks made of concrete. In addition, rainwater, domestic wastewater from houses, and the like are directly drained to sewers, and the U-shaped ditch itself is no longer used.

For this reason, the existing concrete U-shaped groove block which is no longer used may be left as it is. However, when the upper part of the U-shaped groove is open, the pedestrian or car is not allowed to pass. However, it is not preferable to leave it as it is in the way. In addition, even if the U-shaped groove opened at the top is covered with a concrete lid, the noise may rattle when walking or driving a car, which is favorable for residents living near the road. I can't say that.

[0004] Even if the upper portion of the U-shaped groove is covered with the lid, the U-shaped groove is not used as a drainage channel.
Mud, etc., flows into the groove along with rainwater and gets clogged on the way,
For this reason, the rainwater flowing into the U-shaped groove may overflow on the road, causing inconvenience to daily life such as traffic and sanitation.

[0005] Recently, there has been a movement to dig up and remove the U-shaped groove which is no longer used. The U-shaped ditch provided in the case of houses and fences must be dug greatly, including around the U-shaped ditch, in order to excavate and remove the U-shaped ditch, and to occupy private property. It is necessary to obtain permission for excavation in order to excavate, and the procedure for obtaining permission for excavation for the residents is troublesome. In addition, there is a concern that residents who live near the digging ditches are worried that the ground may collapse and the fences and houses may be damaged by excavating the U-shaped ditch, which is difficult work.

For this reason, recently, the work of digging and removing the periphery of the U-shaped groove block made of concrete is stopped, and the inside of the U-shaped groove is filled with soil or cement or the like, and a section as a lid is formed thereon. An L-shaped concrete block is to be installed on it, but a thick L-shaped section block must be placed on top of an existing concrete U-shaped groove block that is conventionally flush with the road surface. Therefore, the side portion of the road protrudes from the ground by the thickness of the lid having an L-shaped cross section.

For this purpose, the upper part of the existing concrete U-shaped groove block is cut by an amount corresponding to the thickness of the concrete block having an L-shaped cross section, and a lid having an L-shaped cross section is placed thereon, and the height from the ground is lowered. Need to be adjusted.

[0008]

However, conventionally,
There is no dedicated work machine for cutting the upper part of the concrete U-shaped groove block buried on the side of the road, and therefore, the upper part of the concrete U-shaped groove block is manually cut by a hammer and a rag. Had been cut. However, the work efficiency of the hammer and ragging tool is poor, requiring a lot of time and labor until the work is completed. Although work using a crusher such as a hand breaker is also performed, it was broken more than necessary, and it was very difficult to cut it to the designed size.
In the case of a hand breaker, the crushed material scattered around and was dangerous work.

Accordingly, the present invention has been made in view of the above-mentioned problems, and has a U-shaped groove cutting device and a U-shaped groove cutting device capable of efficiently cutting the upper portion of a U-shaped groove block made of concrete.
An attachment for cutting a groove is provided.

[0010]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention provides a machine frame and a lower surface side of the machine frame with respect to the machine frame. A cutter device which is mounted so as to be swingable in the horizontal direction and one or a plurality of rotary cutters are rotatably provided by a rotation driving device; and a swing drive for swinging the cutter device relative to the machine frame. And a depth setting device provided on the machine frame and configured to adjust a cutting depth from an upper edge of the U-shaped groove of the rotary cutter.

According to a second aspect of the present invention, there is provided a cutter device comprising: a support frame having a center portion pivotally supported by the machine frame; A rotary cutter provided at each end of the support frame, a rotary cutter rotation drive motor provided on the machine frame, the rotation axis of which is guided to the swing center of the support frame, and the rotary cutter rotation drive It is characterized by comprising a transmission member for transmitting the torque of the motor to the rotary cutter and the torque of the rotary cutter drive motor.

According to a third aspect of the present invention, there is provided a depth setting device, comprising: a rotating roller that is in contact with an outer edge of a U-shaped groove; Changeable means for changing a relative position with respect to the frame.

[0013] In order to achieve the above object, the invention according to claim 4 of the present invention is characterized in that a machine frame has a mounting hole to a front portion of a working machine, and the machine frame has a mounting hole. It is characterized by having a mounting bracket mounted so as to be swingable in the horizontal direction.

[0014]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. FIG. 1 is a schematic side view of a small excavator type excavator equipped with a U-shaped groove cutting attachment of the present invention at the tip of an arm, FIG. 2 is a plan view of FIG. 1, and FIG. FIG. 4 is a side view of a U-shaped groove cutting attachment, FIG. 4 is a plan view showing the U-shaped groove cutting attachment of the present invention disposed in a U-shaped groove, and FIG. 5 is a U-shaped groove cutting attachment of the present invention. FIG. 6 is a schematic side view of a manually movable U-shaped groove cutting device of the present invention, and FIG. 7 is a U-shaped groove of a manually movable U-shaped groove cutting device according to the present invention. It is the top view arrange | positioned inside.

Reference numeral A denotes a small excavator type excavator, which comprises a lower traveling body 1 and an upper revolving body 2 which is rotatably mounted via a revolving device provided on the lower traveling body 1. I have. A ground leveling blade 3 for leveling is provided in front of the lower traveling body 1. In addition, upper revolving superstructure 2
A boom 5 is attached to a boom support 4 provided in front of the boom 5 so as to be rotatable vertically and horizontally. An arm 6 is provided at a tip of the boom 5, and a four-bar link is provided at the tip of the arm 6. At the front end of the four-bar link 7, a mounting bracket 13 of a U-shaped groove cutting attachment B is mounted. The boom 5, the arm 6, and the four-bar link 7 are respectively connected to the hydraulic cylinder 8, It is driven by expansion and contraction of 9, 10.

The excavator A of a small shovel type has a traveling hydraulic motor, a turning hydraulic motor, hydraulic cylinders 8, 9, 10 and hydraulic cylinders for the leveling blade 3, which are provided as standard. Preliminary hydraulic source outlet 11 for preliminary work with actuators such as
Is provided as standard equipment, and a hydraulic hose 12 is connected to the auxiliary hydraulic source outlet 11 so that pressure oil is supplied to various auxiliary work devices.

Next, the structure of the U-shaped groove cutting attachment B of the present invention will be described. The U-shaped groove cutting attachment B is mounted on a substantially square machine frame 17 of a small excavator type excavator A. A mounting bracket frame 19 having mounting brackets 13, 13 having mounting holes 14, 14 for mounting on the four-bar link 7 is mounted on a mounting shaft 20 so as to be swingable.

The attachment B for cutting a U-shaped groove according to the present invention has a U-shape by attaching a mounting bracket frame 19 to a four-bar link 7 attached to the tip of an arm 6 of a small excavator-type excavator A. It is designed to be placed on the groove.

A hydraulic cylinder mounting shaft 22 is provided at the rear of the lower surface of the machine frame 17, and a rear end of a hydraulic cylinder 23 is mounted on the hydraulic cylinder mounting shaft 22. Is Axis 24
The movable frame 25 having a slightly long hexagonal shape is connected via the.

The mounting bracket frame 19 includes:
A hydraulic hose connection port 15 is provided. The hydraulic hose connection port 15 is provided. The hydraulic hose connection port 15 is connected to a spare hydraulic pressure source outlet 11 provided in the small excavator-based excavating work machine A. Upon receiving the supply, pressure oil is supplied to a hydraulic motor 26 mounted with bolts 27, 27 near the front of the mounting bracket frame 19 on the upper surface of the hydraulic cylinder 23 and the machine frame 17.

On the upper surface of the machine frame 17, a hydraulic motor 26 is provided rotatably with respect to the machine frame 17 via a bearing 27a.
The sixth drive shaft 33 is provided so as to penetrate the machine frame 17 and protrude downward. A support base 28 is provided on the lower surface of the machine frame 17 via a bearing 27b so as to be rotatable with respect to the machine frame 17 so that the drive shaft 33 of the hydraulic motor 26 becomes a center of rotation. A slightly long hexagonal movable frame 25 is attached to the table 28. The rear end of the movable frame 25 is connected to the tip of a hydraulic cylinder 23 via a pivot 24,
By the expansion and contraction operation of 3, the movable frame 25 is swung in the left-right direction with the center portion as the swing center.

A rotary cutter 30 attached to a pulley 29 is provided at the front end of the lower surface of the movable frame 25, and a rotary cutter 32 attached to a pulley 31 is provided at the rear end. A drive shaft 33 of the hydraulic motor 26 is driven to rotate a drive pulley 34 provided on the movable frame 25, and the drive pulley 34
A drive belt 35 is wound around the pulleys 29 and 31.

The U-shaped groove cutting attachment B is moved on the upper end of the concrete U-shaped groove block side wall 16 by the movement of a small excavator-type excavator A, and the U-shaped groove cutting attachment B is moved. At the four corners of the machine frame 17 to be constructed, height adjusting screws 38 having a wheel 37 at the lower end for mounting and running the U-shaped groove cutting attachment B on the upper end of the U-shaped groove block side wall 16 made of concrete are provided. ing. Reference numeral 39 denotes a leg for guiding the height adjustment screw 38, and reference numeral 40 denotes a screw head provided above the height adjustment screw 38.

Next, the power source of the manually movable U-shaped groove cutting device B is supplied from the spare hydraulic power source outlet 11 of the small excavator A of the small excavator type. The cutting device B is moved by a small excavator-type excavator A
Irrespective of the traveling of the vehicle, a traveling vehicle is provided in the U-shaped groove cutting device B of a manually pushed type, and a handle provided on the attachment B for cutting the U-shaped groove moves the work place while pushing. The U-shaped groove cutting device of the hand-moving type will be described with reference to FIGS.

FIG. 6 is a schematic side view of a manually movable U-shaped groove cutting device, and FIG. 7 is a manually movable U-shaped groove cutting apparatus according to the present invention.
It is a top view of a character groove cutting device. A hydraulic hose connection port 15 is provided on a substantially square machine frame 17 constituting a frame of the U-shaped groove cutting device of the present invention, which is provided on a small excavator-type excavator A. The auxiliary hydraulic pressure source outlet 11 is connected to a hydraulic hose 12 so as to be supplied with hydraulic pressure from a small excavator A of a small shovel type. Handle mounting brackets 41, 41 are directly mounted on both sides of the upper rear surface of the machine frame 17, and the ends of the handle 42 are pivotally attached to the handle mounting brackets 41, 41.

A cylindrical body 2 supported by a thrust bearing is provided in a hole provided at the center of the upper surface of the machine frame 17.
7, and the drive shaft 33 of the hydraulic motor 26 is housed in the cylindrical body 27. A support 28 is attached to the lower end of the cylindrical body 27 by bolts.
A central portion of a slightly long hexagonal movable frame 25 is attached to 8. The movable frame 2 having a slightly long hexagonal shape as described above
5 is supported on the machine frame 17 by a thrust bearing, and the rear end of the movable frame 25 is
Since the hydraulic cylinder 23 is connected to the tip of the hydraulic cylinder 23 through the extension 4, the movable cylinder 25 is swung in the left-right direction about the center of the movable frame 25 by the expansion and contraction operation of the hydraulic cylinder 23.

A drive pulley 34 is provided at the center of the slightly long hexagonal movable frame 25.
Is a hydraulic motor 26 projecting from the lower end of the cylindrical body 27.
Is connected to the other end of the drive shaft 33. A pulley 29 is provided on the front end of the lower surface of the movable frame 25 having a slightly long hexagonal shape.
And a rotary cutter 32 attached to a pulley 31 at the rear end.

The drive pulley 34 is rotated by the rotation of the drive shaft 33 of the hydraulic motor 26. The drive pulley 33, the pulley 29, and the pulley 3
The pulley 29 and the pulley 31 are rotated by the drive belt 35 wound around 1, and the rotary cutter 30 and the rotary cutter 32 attached to the pulleys 29 and 31 are rotated.
Is rotated. It has substantially the same configuration as the attachment B for cutting a U-shaped groove attached to the four-bar link 7 provided at the tip of the arm 6 of the small excavator A of the small shovel type described above.

The U-shaped groove cutting attachment B is moved on the upper end of the concrete U-shaped groove block side wall 16 by a handle provided by a worker behind a machine frame 17 constituting the U-shaped groove cutting attachment B. It is moved by pushing or pulling 42. For this movement, height adjusting screws 38 having wheels 37 at the lower ends are provided at the four corners of the machine frame 17. Reference numeral 39 denotes a leg for guiding the height adjustment screw 38, and reference numeral 40 denotes a screw head provided above the height adjustment screw 38.

Next, a cutting operation process using the U-shaped groove cutting attachment of the present invention having the above-described structure will be described. The operation of the U-shaped groove cutting attachment of the present invention in which the U-shaped groove cutting attachment B is attached to the four-bar link 7 provided at the tip of the arm 6 of the small excavator-type excavator A will be described. First, as a first step, the inside of the U-shaped groove that is no longer used is filled with soil, concrete, or the like to a predetermined depth (until the height at which the side wall of the U-shaped groove is to be cut) to solidify the concrete.

Next, the mounting bracket 13 provided on the mounting bracket frame 19 of the machine frame 17 of the attachment B for cutting U-shaped grooves is attached to the four-bar link at the tip of the arm 6 of the excavator A of a small shovel type. , 13 are attached by bolts. Then, one end of the hydraulic hose 12 is connected to the spare hydraulic source outlet 11 provided as standard equipment on the excavator A, and the other end of the hydraulic hose 12 is connected to the mounting bracket 17 of the machine frame 17 of the attachment B for U-shaped groove cutting. It is connected to the hydraulic hose connection port 15 of the frame 19.

Next, the boom 5, the arm 6, and the four-bar link 7 are operated by driving the hydraulic cylinders 8, 9, and 10 of the small excavator-type excavator A, and the U-bar provided on the four-bar link 7 is operated. The attachment B for cutting the groove is placed on the upper end of the concrete U-shaped groove block of the side groove to be cut, and the auxiliary hydraulic source outlet 11 of the small excavator-type excavating work machine A is controlled by a control device (not shown). -Hydraulic hose 1
(2) The hydraulic oil is supplied to the hydraulic motor 26 provided on the machine frame 17 of the attachment B for U-shaped groove cutting through the hydraulic hose connection port 15, and the hydraulic motor 26 is rotationally driven.

The rotation of the hydraulic motor 26 is carried out from the drive shaft 33 via the drive pulley 34-drive belt 35-pulley 29 and pulley 31 to the rotary cutter 30 and rotary cutter 3
Rotate 2. After the rotary cutter 30 and the rotary cutter 32 rotate, the hydraulic cylinder 23 is extended and contracted by a control device (not shown), so that the movable frame 25 including the rotary cutter 30 and the rotary cutter 32 is moved to the center of the movable frame 25. The part is pivoted in the left or right direction with the part as the pivot center, and the cutting edges of the rotary cutter 30 and the rotary cutter 32 are respectively aligned with the side walls 16 of the U-shaped groove block made of concrete.

At this time, water is discharged from the cooling water hose 36 provided on the side of the rotary cutter 30 and the rotary cutter 32 toward the cutting edges of the rotary cutter 30 and the rotary cutter 32, thereby cooling the cutting edge of the rotary cutter by cutting. At the same time, scattering of dust generated when cutting the concrete U-shaped groove block is prevented.

The adjustment of the mounting angle between the U-shaped groove cutting attachment B provided on the four-bar link 7 of the small excavator-based excavator A and the concrete U-shaped groove block side wall 16 is described in detail below. A boom 5 is attached to a boom support 4 provided in front of an upper revolving structure 2 of the excavator A of the shovel type. 19 is rotatably mounted on a mounting shaft 20, and the mounting angle between the machine frame 17 and the mounting bracket frame 19 can be adjusted by appropriately changing the mounting positions of the bolts 21 and 21. The running direction of the small excavator type excavator A can be easily adjusted to the direction of the gutter.

A side wall 1 for cutting the cutting edges of the rotary cutter 30 and the rotary cutter 32 with a concrete U-shaped groove block.
6, when the blade is pressed against the upper part of the U-shaped groove block side wall 16 by the blade, the opposing force is maintained because the soil is held on the both outer side surfaces of the U-shaped groove block side wall 16 made of concrete. In addition, the upper part of the U-shaped groove block side wall 16 can be cut by the rotary cutter 30 and the rotary cutter 32 without the upper end of the U-shaped groove block side wall 16 simply expanding outward.

As described above, the rotary cutter 30 and the rotary cutter 3 of the attachment B for cutting a U-shaped groove provided on the four-bar link 7 of the arm 5 of the excavator A of a small shovel type.
2. Side wall 16 of concrete U-shaped groove block by 2
Is cut, the excavating machine A is moved to the next uncut concrete U-shaped groove block, and while the above-described work steps are sequentially repeated, the U
Cut the upper part of the groove.

Next, the operation of the U-shaped groove cutting device of the hand-moving type will be described. First, the U-shaped groove that is no longer used is brought to a predetermined depth (until the cut height of the side wall of the U-shaped groove is reached). ) Fill with soil or concrete and solidify the concrete.

Next, height adjusting screws attached to the upper ends of the side walls 16, 16 of the U-shaped groove whose interior is filled with soil, concrete, or the like, near the rear end of the machine frame 17 and on the front arm. Before mounting the car 37 provided at the lower end of the machine frame, the height adjustment screw 3
The upper ends of both side walls 16, 16 of the U-shaped groove on which the wheels 37, 37 provided at the lower ends of the 8, 38 are placed are previously cut to the intended cutting depth of the side wall of the U-shaped groove with a rag and a hammer.

The both side walls 16, 16 of the cut U-shaped groove
Height adjustment screws 38, 38 attached to the rear of the machine frame 17 on the upper side of the U-shaped groove and on the upper ends of both side walls 16, 16 of the U-shaped groove.
37, 37 provided at the lower end by adjusting the length of the vehicle, and height adjusting screws 38, 38 mounted in front of the machine frame 17
Is adjusted and the wheels 37, 37 provided at the lower end are placed.

Then, a spare hydraulic source outlet 1 of the small excavator-type excavator A is controlled by a controller (not shown).
1 to the hydraulic hose 12-connected to the hydraulic hose connection port 15 of the machine frame 17, to supply hydraulic oil to a hydraulic motor 26 provided on the machine frame 17 of the U-shaped groove cutting attachment B, Drive rotationally.

The rotary cutter 30 and the rotary cutter 3
The case where hydraulic motor 26 is used as a drive source for rotating and driving hydraulic motor 2 and pressure oil is supplied from spare hydraulic source outlet 11 of small excavator A as a drive source of hydraulic motor 26 As described above, an electric motor may be used instead of the hydraulic motor 26, and electric power may be supplied from the small excavator-type excavator A.

The rotation of the hydraulic motor 26 is carried out from the drive shaft 33 via the drive pulley 34-drive belt 35-pulley 29 and pulley 31 to the rotary cutter 30 and the rotary cutter 3.
Rotate 2. After the rotary cutter 30 and the rotary cutter 32 rotate, the hydraulic cylinder 23 is extended and contracted by a control device (not shown), so that the movable frame 25 including the rotary cutter 30 and the rotary cutter 32 is moved to the center of the movable frame 25. The part is swung in the left or right direction with the part as the center of swing, and the cutting edges of the rotary cutter 30 and the rotary cutter 32 are cut according to the cutting position of the concrete U-shaped groove block.

At this time, water is discharged from the cooling water hose 36 provided on the side of the rotary cutter 30 and the rotary cutter 32 toward the cutting edges of the rotary cutter 30 and the rotary cutter 32, thereby cooling the cutting edge of the rotary cutter by cutting. At the same time, scattering of dust generated when cutting the concrete U-shaped groove block is prevented.

A side wall 1 for cutting the edge of the rotary cutter 30 and the rotary cutter 32 with a U-shaped groove block made of concrete.
6, when the blade is pressed against the upper part of the U-shaped groove block side wall 16 by the blade, the opposing force is maintained because the soil is held on the both outer side surfaces of the U-shaped groove block side wall 16 made of concrete. In addition, the upper part of the U-shaped groove block side wall 16 can be cut by the rotary cutter 30 and the rotary cutter 32 without the upper end of the U-shaped groove block side wall 16 simply expanding outward.

When the upper portion of the U-shaped groove block side wall 16 is cut in this manner, the handle 42 pivotally secured to the handle mounting bracket 41 provided at the rear of the machine frame 17 of the manually-movable U-shaped groove cutting device. The operator pushes the hand-operated moving U-shaped groove cutting device to the next uncut concrete U-shaped groove block portion, and repeats the above-described operation steps sequentially, thereby making the upper part of the U-shaped groove no longer used. Are cut one after another, and after the work of cutting the upper part of the concrete U-shaped groove block is completed, the L-shaped block is placed on the upper part of the concrete U-shaped groove block.

As described above, in the attachment for cutting a U-shaped groove according to the present invention, the power source for driving the attachment is supplied from the auxiliary hydraulic power source outlet provided in advance as well as the standard equipment on the work machine main body side. And on the working machine body side,
Since the attachment for cutting the U-shaped groove is attached, it can be easily diverted without special processing. Further, since a separate power source is not used, the work site is not complicated. In addition, since the upper part of the concrete U-shaped groove block is cut by the rotary cutter, the work efficiency is higher than that of the conventional hammering and cutting with a hammer, and it can be cut to the designed size. The effect is that scattering does not occur.

In the cutting operation using the manually-pushed U-shaped groove cutting device B, a small excavator-type excavating machine A is used as a power source for driving the attachment from a preliminary hydraulic pressure source outlet which is preliminarily equipped as a power source. Since only the supply of pressurized oil is supplied, the small excavator-based excavator A can perform a normal excavation operation near the hand-operated U-shaped groove cutter B.

[0049]

As described above, in the attachment for cutting a U-shaped groove according to the present invention, the power source for driving the attachment is also provided as standard equipment on the work machine main body side, and from the pre-equipped preliminary drive source outlet provided in advance. By being supplied, the work machine main body side can be easily diverted without performing special processing to attach the U-shaped groove cutting attachment. Since a separate power source is not used, the work site is not complicated. In addition, since the upper part of the concrete U-shaped groove block is cut by the rotary cutter, the work efficiency is higher than that of the conventional hammering and cutting with a hammer, and it can be cut to the designed size. The effect is that scattering does not occur.

Further, in the cutting operation using the manually-pushed U-shaped groove cutting device, a small excavator-based excavating work machine is supplied with power from a preliminary driving source outlet which is preliminarily equipped as a power source for driving the attachment. Therefore, a small-sized excavator-based excavator can perform a normal excavation operation near a hand-operated U-shaped groove cutting device.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a small excavator type excavator equipped with a U-shaped groove cutting attachment of the present invention at the tip of an arm;

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a side view of the U-shaped groove cutting attachment of the present invention;

FIG. 4 is a plan view showing the U-shaped groove cutting attachment of the present invention arranged in a U-shaped groove;

FIG. 5 is a plan view showing the U-groove cutting attachment of the present invention arranged in a working state in the U-groove;

FIG. 6 is a schematic side view of a U-shaped groove cutting device of a hand-moving type,

FIG. 7 is a plan view in which the manually pushed U-shaped groove cutting device of the present invention is arranged in a U-shaped groove.

[Explanation of symbols]

A small excavator-based excavator, B U-groove cutting attachment, 1 lower traveling structure, 2 upper revolving structure, 3 ground leveling blade, 4 boom support, 5
Boom, 6 arm, 7 four bar link, 8 hydraulic cylinder for boom, 9 hydraulic cylinder for arm,
10 Hydraulic cylinder for four-bar link, 11 Reserve hydraulic source outlet, 12 Hydraulic hose, 13 Mounting bracket, 14 Mounting hole, 15 Hydraulic hose connection port, 16
Concrete U-shaped groove block side wall, 17 machine frame, 18 mounting shaft, 19 mounting bracket frame, 20 mounting shaft, 21 bolt, 22 hydraulic cylinder mounting shaft, 23 hydraulic cylinder, 24 pivot, 25 movable frame, 26 hydraulic motor , 2
7 cylindrical body, 27a bearing, 27b bearing, 28 support base, 29 pulley, 30 rotary cutter, 31 pulley, 32 rotary cutter, 3
3 drive shaft, 34 drive pulley, 35 drive belt, 36 cooling water hose, 37 car, 38 height adjustment screw, 39 legs, 40 screw head, 41 handle mounting bracket, 42 handle, 43 cut-out part.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D051 DA01 2D053 AA26 AB08 AB09 BA01 BA09 DA02 DA03 3C069 AA01 BA04 BB03 BC02 BC04 CA08 CA09 EA01 EA02

Claims (4)

[Claims] 1. A machine frame, and is mounted on a lower surface side of the machine frame so as to be swingable in a horizontal direction with respect to the machine frame, and one or a plurality of rotating cutters are rotatable by a rotation driving device. A cutter device provided; a swing drive device for swinging the cutter device with respect to the machine frame; and a cutting device provided on the machine frame, cutting from an upper edge of a U-shaped groove of the rotary cutter. A U-shaped groove cutting device, comprising: a depth setting device for adjusting a depth. 2. The cutter device according to claim 1, wherein a center portion of the support frame is swingably supported by the machine frame, rotating cutters respectively provided at both ends of the support frame, A rotating cutter rotation drive motor whose rotation axis is guided to the swing center of the support frame; and a rotation force of the rotation cutter rotation drive motor, and a rotation force of the rotation cutter rotation drive motor to the rotation cutter. 2. A transmission member for transmitting a signal.
The U-shaped groove cutting device according to item 1. 3. The depth setting device according to claim 1, further comprising: a rotating roller that contacts the outer edge of the U-shaped groove, and changeable means that can change a relative position between the rotating roller and a machine frame. The U-shaped groove cutting device according to claim 1. 4. The machine frame further comprises a mounting bracket having a mounting hole to a front portion of a working machine, and being mounted on the machine frame so as to be swingable in a horizontal direction. The U-shaped groove cutting attachment according to claim 1.